Update ceph-csi.md

edited the language to be more in line with a how-to guide rather than tutorial. Also changes to layout and heading

docs/src/charm/howto/ceph-csi.md

@@ -1,34 +1,24 @@
-# ceph-csi
+# How to integrate {{product}} with ceph-csi
 
 [Ceph] can be used to hold Kubernetes persistent volumes and is the recommended
 storage solution for {{product}}.
 
 The ``ceph-csi`` plugin automatically provisions and attaches the Ceph volumes
 to Kubernetes workloads.
 
-Follow this guide to find how {{product}} can be integrated with Ceph through
-Juju.
+## What you'll need
 
-## Prerequisites
-
-This guide assumes that you have an already existing {{product}} cluster.
+This guide assumes that you have an existing {{product}} cluster.
 See the [charm installation] guide for more details.
 
 In case of localhost/LXD Juju clouds, please make sure that the K8s units are
-configured to use VM containers with ubuntu 22.04 as base. For example, use
-the following:
-
-```
-juju deploy k8s --channel=latest/edge \
-    --base "ubuntu@22.04" \
-    --constraints "cores=2 mem=8G root-disk=16G virt-type=virtual-machine"
-```
+configured to use VM containers with Ubuntu 22.04 as the base and adding the 
+``virt-type=virtual-machine`` constraint.
 
 ## Deploying Ceph
 
-We'll deploy a Ceph cluster containing one monitor and three storage units
-(OSDs). For the purpose of this demo, we'll allocate a limited amount of
-resources.
+Deploy a Ceph cluster containing one monitor and three storage units
+(OSDs). In this example, a limited amount of reources is being allocated.
 
 ```
 juju deploy -n 1 ceph-mon \
@@ -40,19 +30,20 @@ juju deploy -n 3 ceph-osd \
 juju integrate ceph-osd:mon ceph-mon:osd
 ```
 
-If using LXD, please configure the OSD units to use VM containers by adding the
-following constraint: ``virt-type=virtual-machine``.
+If using LXD, configure the OSD units to use VM containers by adding the 
+constraint: ``virt-type=virtual-machine``.
 
-Once the units are ready, deploy ``ceph-csi`` like so:
+Once the units are ready, deploy ``ceph-csi``. By default, this enables 
+the ``ceph-xfs`` and ``ceph-ext4`` storage classes, which leverage 
+Ceph RBD.
 
 ```
 juju deploy ceph-csi --config provisioner-replicas=1
 juju integrate ceph-csi k8s:ceph-k8s-info
 juju integrate ceph-csi ceph-mon:client
 ```
 
-By default, this enables the ``ceph-xfs`` and ``ceph-ext4`` storage classes,
-which leverage Ceph RBD. CephFS support can optionally be enabled like so:
+CephFS support can optionally be enabled:
 
 ```
 juju deploy ceph-fs
@@ -62,8 +53,8 @@ juju config ceph-csi cephfs-enable=True
 
 ## Validating the CSI integration
 
-Use the following to ensure that the storage classes are available and that the
-csi pods are running:
+Ensure that the storage classes are available and that the
+CSI pods are running:
 
 ```
 juju ssh k8s/leader -- sudo k8s kubectl get sc,po --namespace default
@@ -72,7 +63,7 @@ juju ssh k8s/leader -- sudo k8s kubectl get sc,po --namespace default
 The list should include the ``ceph-xfs`` and ``ceph-ext4`` storage classes as
 well as ``cephfs``, if it was enabled.
 
-Let's make sure that Ceph PVCs work as expected. Connect to the k8s leader unit
+Verify that Ceph PVCs work as expected. Connect to the k8s leader unit
 and define a PVC like so:
 
 ```
@@ -97,7 +88,7 @@ EOF
 sudo k8s kubectl apply -f /tmp/pvc.yaml
 ```
 
-Next, we are going to create a pod that writes to a Ceph volume:
+Next, create a pod that writes to a Ceph volume:
 
 ```
 cat <<EOF > /tmp/writer.yaml